Merging two JSON data in nodejs

Question

I want to add the two JSON data in to one object..

this is Array name as MAPPER.

[ MAPPER {
     FieldOne: 'ABC',
     FieldTwo: 'City',
     FieldThree: 'John Wick
     FieldFour: '1234556789' } ]

And our json file is

[
{
userId: "1",
Title: "js",
Status: "done"
},
{
userId: "2",
Title: "nodejs",
Status: "pending"
},
{
userId: "3",
Title: "node1",
Status: "done"
}
]

what i want is to add this two into one JSON data..

so our final file will look like

[
    {
        userId: "1",
        Title: "js",
        Status: "done",
        FieldOne: 'ABC',
        FieldTwo: 'City',
        FieldThree: 'John Wick'
        FieldFour: '1234556789' 
    }
    and so on...
]

if any one this please share up the things.. Thanks in advance..

have you tried anything yourself?

Jaromanda X
– Jaromanda X

2017-05-24 09:58:23 +00:00
Commented May 24, 2017 at 9:58 — Jaromanda X
– Jaromanda X, Commented May 24, 2017 at 9:58

zforgo · Accepted Answer · 2023-09-29 08:44:59Z

3

You could use Object.assign and use mapper as template for a new object.

var mapper = { FieldOne: 'ABC', FieldTwo: 'City', FieldThree: 'John.Wick', FieldFour: '1234567890' },
    data = [{ userId: "1", Title: "js", Status: "done" }, { userId: "2", Title: "nodejs", Status: "pending" }, { userId: "3", Title: "node1", Status: "done" }],
    result = data.map(o => Object.assign({}, mapper, o));

console.log(result);

.as-console-wrapper { max-height: 100% !important; top: 0; }

edited Sep 29, 2023 at 8:44

zforgo

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answered May 24, 2017 at 10:11

Nina Scholz

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Comments

Aron · Accepted Answer · 2017-05-24 10:10:14Z

0

You could do this by mapping over one array and referencing the mapper array elements by their indices.

Combined with the object spread syntax you can merge the elements easily.

const combined = users.map((user, index) => {
    return {
        ...user,
        ...mapper[index]
    }
});

answered May 24, 2017 at 10:10

Aron

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